Compressor



Jan. 5 1926.

- 1,568,195 C. C. SPREEN I COMPRESSOR Filqd Nov. 1924 1 g- ,w I w I A F19 23 ,I'IA' F i 4 Charles C Spr e;

[22 vezzfvr Maw mama Jan. 5, 1926.

UNITED S ATES PATENT OFFICE.

0. arm, DETROIT, MICHIGAN, ASSIG-NOR, BY MESNE ASSIGNMENTS, TO mvmnron OOBPORATIOIL'OI DETROIT, MICHIGAN, A CORPORATION 01 IIOHIGAN.

Application fled November To all whom it may concern:

Be it known that I, CHARLES C. SIBEEN, a citizen of the United States of America, and a resident of Detroit, in the county of Wayne and State of Michi an, have invented certain new and useful Im rovements in Compressors, of which the. ollowing is a full, clear, and exact description.

This invention relates to compressors, and 0 has special reference to compressors used for automatic domestic refrigerating machinery althou h not restricted to such use. However, t e compressors employed in refrigerating machinery, in addition to .being obliged to handle gases quietly and efliciently are also obliged under certain abnormal con ditions to permit the passage of slugs of refrigeratin liquid. In order to effect the eflicient an quiet handling of gases it is 9 desirable to use very light valve members and to restrict the movement of such mem-' bars to a verysmall'de while to permit thepassage of a be y of liquid a much greater opening is necessary.- The objects of the present invention are the provision of an improved. t in of outlet valve which shall combine t e features of a light and le as valve movable a limited distance a eavier and more substantial liquid 30 valve movable throu h a greater distance; the provision of a vs vs mechanism of this character of such a design as can be made by stamping from sheet metal' the provision of a valve mechanism of this character in which 35 the gas valve shall consist of a flat disk of sheet metal free from .windor distortion;

the provision of a valve which shall be safe against accidental displacement; while further objects and advantafis of the invention will become apparent as e desoriptionpro- In the drawings accompanyingx and 4 forming a part of this ap lication I I ave shown a simp e form of mec anism embodying my 1 improvements althou h it will be understood that the parts s own are intended to y be merely illustrative of a t pical form and not exhaustive as to detailed construction.

Fig. 1 is a, longitudinal sectional view throu h a part of-a.compressor cylinder and head having my improved'valve; Fig. 2 is an enlarge central sectional view of the valve; Fig. 3 is a perspective view of the oonraasson.

e, 1924. Serial-No: 748,067.

lief member; and Fig. 4 is a perspective view of the valve disk.

I have shown a compremor cylinder 1 havin' therein a piston 2 and having its end c osed by a flat plate 4 formed with an outlet port 5. Surrounding this port upon the outer face of the plate is a counterbore 6,

the bottom of which exhibits a narrow inteing is held tightly in place. Suitable means are preferably employed to keep this housing strictly in alignment with the port 5, one of the most convenient means being to continue the walls of the cylindrical portion at points between adjacent feet so as to depend into the recess 6 as shown in Figs. 1 and 2. The walls of the portion 10 are also preferably formed with apertures. 14.- for the free esca e of fluids assing through the pump an the top of t e portion 11 is also preferably formed with an inwardly projecting flange 15 defining a central aperture 16 for the same purpose. This member is preferably made by standing and drawing a suitable piece of sheet metal in the manner well understood by those skilled in the art.

Slidably-mounted inside the portion 10 is a relief member also preferably made of sheet metal, and com rising a cup-shaped portion having a flat ottom1-8, walls 19, a flat lip 20 at the top, and a cylindrical guiding portion 21 depending from the margin of said lip. The portion 21 fits slidably within the portion 10 of the housing and is formed with slots or apertures or recesses 22 for the passa e of fluid. The wall 19 is also preferablyv ormed with other passages 23 for the same purpose. The side wall of this member may be either considered as a cylindrical surface having holes in it, or a luralit of legs definin a c lindrical suraee. he bottoms of t ese e are solocated relative to the surface 0 the portion 1&astcrtmthe-valre disk 8 the limited degree of lift necessary for the passage of gas, from 5 to 8 thousandths of an inch being a very satisfactory provision. The diameter of the valve is such'as'tofit loosely inside the wail 21 which accordingly constitutes a guide therefon. The bottom face of the lip 20 constitutes a seat for a coil spring 25 which resses downwardl upon the valve disk, while the top of said ip constitutes a seat for a second coil spring 26 which presses upwardly against the flange 15. The portion 11 of the housing is shown as of smaller diameter than the portion 10 so as to embrace the last named spring snugly though this is rather a matter of design than of necessity. The heads of the screws 13 are preferably formed with transverse apertures 28 for the reception of a wire 30 by which accidental loosening of the same is prevented; the top of the plate 4 also constitutes the seat for a hollow cap member 32, tightly held in place, whose lower side is recessed to form a chamber 33 to receive the compressed fluid, and the walls of this chamber by conforming to the shape of the housing and screws may further be relied upon to prevent displacement. A. suitable pipe 35 communicating with this chamber constitutes an outlet for the gas.

The stifl'ness of the spring 25 is much smaller than that of the spring 26, being made only suificient to return the valve disk -8 prom tly to its seat, this disk also being prefera ly made of extremely small thickness and weight. In case of a rush of liquid through the pump, the increased local pressure produced thereby displaces the relief valve 20 against the tensi-on'of the s ring 26, thereby enabling a greater de ree o unseating of the disk 8. Further t e upstanding annular shape of the flange 7 permits a free and unobstructed outflow of the compressed as laterally in all directions, thus enabling free discharge of the compressor with a minimurn'of valve lift. This mode of housing and guiding the valve enables the use of a flat disk-of maximum simplicity and lightness while the general structure of my improved valve enables its production in quantity by stamping from sheet metal with a minimum of independent machining, grinding of =arts, and other manipulations.

However, it will be understood that many minor changes can be made without departing from my invention and that I do not limit myself except as specifically recited in my several claims.

Having I claim is:

1. In a gas compressor, the combination with a closure having an outlet port, said port being surrounded on its outward side by an integral upstanding annular flan e, of a valve disk adapted to seat on said auge thus described my invention what aseaiae and close said port, a relief member having portion overhanging said disk in movement limiting relation, the walls of said relief member having outlet ports, a light spring interposed between said relief member and disk, and a second stronger spring pressing said .relief member axially towards said closure.

2. In a gas compressor, the combination, with a closure having an outlet port, said port being surrounded on its outward side by an integral upstanding annular flan e, of a valve disk adapted to seat on said ange and closing said'port, a housing carried by said closure and having a cylindrical guiding portion substantially coaxial with said port, a relief member slidably mounted in said housing, said relief member having portions which engage the closure member outside the said disk and other portions overhanging said disk and spacedtherefrom an amount equal to the normal lift of said disk, at light spring interposed between said member and disk and tendin to seat the latter, and a stronger sprin interposed between said housing and mem er.

3. In a gas compressor, in combination, a member formed with an outlet port, there being a valve seat surrounding said port upon its outward side, a flat circular valve disk adapted to enga e said seat, a relief member engaging sai closure outside the said seat and also having a central ortion depending into close roximity to said disk to constitute a stop t erefor, there being a recess between the outer and inner portions of said relief member, and a spring in said recess pressing on said disk.

4. In a gas compressor, in combination, a closure having an outlet port and a valve seat surrounding said port upon its outer side, a thin circular valve disk engagin said seat, a cup-shaped member locate above said valve disk with its bottom in close proximity to such disk, its walls project ng away from said disk, its lip spaced from said disk, and a wall depending from said lip past .the edges of said disk into engagement with said closure, said wall having apertures therein for the passage of fluid and depending past the bottom of said cup, and a spring interposed between said disk and the lip of said cup.

5. In a gas compressor, in combination, a

ing a substantially cylindrical wall fitting slidably inside said cylindrical cavity, one

,. spring located between said wall and stopend ofsaid wall eng said. closure out side the said disk, e other end of said wall carrying a stop portion which depends into close proximity with said disk, a light portion and pressing upon said disk, and a stronger spring interposed between said relief member and spring seat.

6. In a gas compressonm combination, a

, closure having an outlet port and a counterbore"'surround' theaouter end of said port, a cylindrical ousi 'said counterbore and rigid y secured to said closure, a movable relief member mounted inside said housing, a valveoverlying said port, said relief member having a stopping depending into and a second stronger spring carried by the liaising and pressing upon'said relief mem- 7 In a compressor for the do scribed, the combination of a seat member,

a valve engaging said seat, a movable member having a cylindrical wall which loose- 1y surrounds sald valve and engages the seat. member, said movable member also having a" depending portion which extends into movement limiting relation with said valvfi f there being an annular cavity between sai wall and said depending portion, a sprin located in said cavity and pressing on sai valve, a fixed member secured to said closure and overhanging said movable member,

and spring means interposed between said fixed and movable members and pressing said movable member toward said closure.

In testimony whereof, I hereunto afix my signature.

' CHARLES C. SPREEN. 

